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Texas Two Steppers

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Posted: 07/08/11 07:10am Link  |  Print  |  Notify Moderator

Under ideal conditions how many amps per hour will a 100 amp charger supplied by a 10 amp generator deliver to a set of batteries?


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sparkydave

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Posted: 07/08/11 07:18am Link  |  Print  |  Notify Moderator

There is no "amps per hour". Just amps. That's a little like saying your car goes 60 miles per hour per hour.

The answer is 100 amps. If you're talking about how long it takes to charge your batteries, then it depends on many other variables, like how many batteries, how many amp-hours they are, etc..

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Posted: 07/08/11 08:09am Link  |  Print  |  Notify Moderator

Texas Two Steppers wrote:

Under ideal conditions how many amps per hour will a 100 amp charger supplied by a 10 amp generator deliver to a set of batteries?
A 10 amp generator? How many continuous watts does this generator put out? A Powermax 100 amp converter requires a continuous 1620 watts from shore or a generator to output that 100 amps. An Iota 90 amp requires 1500 watts.


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Texas Two Steppers

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Posted: 07/08/11 08:32am Link  |  Print  |  Notify Moderator

Here's s some more information. Generator is a Honda eu2000 with rated current output of 13.3 ac amps and rated output of 1600 va.
4 Interstate batteries with total amp hrs of 460. Inverter/charger Magnum MS2012 output 100ADC, input current for rated output 15 AAC, with charger efficiency of 85%.

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MrWizard

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Posted: 07/08/11 09:46am Link  |  Print  |  Notify Moderator

Well the converter can't get 15amps from the HONDA
If you run our batteries down to the point that they Will accept 100amps the converter will overload the Honda, and this is with No Other loads

Charge time will depend on how low you take the batteries
I suggest keeping them above 70% , no more than 30% discharge , to avoid problems,
Better yet maybe the magnum can be programmed for a lower charge Rte like 60amps this will keep the Honda happy


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Wayne Dohnal

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Posted: 07/08/11 09:56am Link  |  Print  |  Notify Moderator

That charger is pushing the limits of the eu2000i. An 80 amp charger pretty much maxes out the generator. When you're close to the edge of working or not working, a bunch of other factors come into play: Is the charger power factor corrected?, What altitude are you operating at? Will you be wanting to power other devices from the generator at the same time?

The actual DC output is controlled not only by the charger's maximum output, but by how much current the battery will pull. The battery will have to be run down pretty far to pull the full 100 amps, and if it does, it won't stay up there for a long amount of time. Many chargers in the class of the MS2012 allow you to set the maximum amount of power it will pull from the AC input. If you have this capability, that's the ticket to making it play well with the eu2000i.


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RoyB

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Posted: 07/08/11 10:19am Link  |  Print  |  Notify Moderator

with my POPUP trailer shore power cable connected directly into my Honda 2KW generator using a RV30-15A Dual Adapter my on-board PD9260C Converter will re-charge my three GP24 "punny" 90AH deep cycle batteries in as little as 3-4 hours.

I usually shoot for 5 hours generator run (usually 8AM-10AM and then again at 4:30PM-7:30PM) as we usually do other things with the generator like making coffee and running the microwave or electric skillet. Of course running my generators depends on where I am at and what the camp ground will allow. The trick for me was to get 14.4VDC being supplied to the battery bank and I usually measure 50 AMPS PLUS for a few minutes before it all starts settling down.

I also carry a portable 120VAC SMART charger with me so I can pre-charge my batteries y sometimes to get some charge back in the them so that my 2KW generator will work better with the PD9260C. That loads the generator down pretty good if batteries are way down in charge. I cant imagine what a 90AMP requirement would do to my 2KW generator knowing what a 60AMP load does.

* This post was edited 07/08/11 10:25am by RoyB *


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wa8yxm

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Posted: 07/08/11 10:31am Link  |  Print  |  Notify Moderator

Well, if you have a generator that puts out a max of 10 amps at 120 volts about 80 amps is the most you can expect to deliver to the batteries but the conditions won't be ideal.. (By the way,, Been there, done that)

My Progressive 9180 with wizard will run on a Genrac 1000, this generator has 10 amp breakers (two of them one for the 12 volt joke circuit) and neither was tripped when I used it to power the PDI with a pair of U-2200s that were deader than ... They should have been (Way below 50 percent soc, I'm talking single digit on the volt meter) Generator ran till the tank was dry, batteries were much happier after that. But that is about the best you can expect rate wise.

NOTE: 100 amps times 120 volts = 1200 watts, 1200 times 0.9 is about the most you can get 1080 watts is thus the theroretical max.

1080/14.6 = 73.97 amps.. Of course this is "Ideal" if it's putting out 70 amps, it's not yet up to fourteen volts. Which is why it worked.


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Matthew_B

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Posted: 07/08/11 10:38am Link  |  Print  |  Notify Moderator

As others have pointed out the output is measured in amps, not amp hours.

Battery capacity is measured in amp-hours. It is how many amps is flowing times the time that current is flowing in hours.

PS: It's not kilowatts per hour either.





smkettner

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Posted: 07/08/11 11:03am Link  |  Print  |  Notify Moderator

Well just give it a go. If the Honda complains then turn the charging amps down. I think you will get 70 to 90 amps into the battery.


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